Apple Gets Patent To Build Curved Glass Display For iPhone, iPad


It looks like Samsung and Motorola are not the only companies planning to introduce smartphones with curved glass display, Apple has been awarded a patent by the US Patent and Trademark Office for a technique that molds thin glass into bent or curved shapes.

Apple has mentioned the drawbacks with the current technique of moulding glass:

Various processes have been proposed for slumping glass or shaping glass to impart a bend or curvature thereto. One process is a “dropout” process. Vacuum forming processes have also been used to shape glass softened by heating. However, numerous disadvantages and drawbacks are associated with the dropout and vacuum forming processes for slumping glass.

 These processes utilize fixed alignment systems to secure the edges of the glass to the molds. However, these fixed alignment systems could inhibit the glass from dropping or sagging into the cavities of the molds. This results in formation of protruding, perimetrical flanges in the glass after shaping, such flanges circumscribing or surrounding portions of the glass that have been allowed to drop or sag into the cavities. Depending on the intended use for the shaped glass, such flanges may be undesirable and require removal. Removal of the flanges adds additional cost, labor and time to the glass shaping processes.

Another drawback is that the glass tends to be undesirably stretched when they drop or sag into the molds. Additionally, although dropout processes are effective for relatively thick (e.g. 1/2 to 1 inch thick) glass, such processes are generally unsuitable for relatively thin (e.g. 1/4 inch thick or less) glass. Most dropout processes involve heating the glass relatively rapidly, which is detrimental to relatively thin glass and/or “art” glass. Some dropout processes also involve multiple heating cycles (firings), movement of the glass during heating, repositioning of the glass in or on the molds and/or transfers of the glass between different molds, thusly adding undesirably to the complexity, cost, time and labor for the glass shaping processes.

 Furthermore, these processes typically involve contacting the glass with chemicals, gases or extraneous mechanical components, which is undesirable. Additionally, when vacuum forming, the glass may crack or otherwise be impaired due to inconsistencies or lack of control in the applied vacuum. Moreover, the appearance of the glass may be undesirably altered due to application of the vacuum, which is a significant drawback when aesthetics are important. Furthermore, in each of these processes, after the glass is slumped, the glass must still be grinded to form the finished edges.

Apple engineers have proposed that by shifting the alignment system with hotter temperatures during a glass slumping process, it would allow the glass to bend around the mold without any interference.

While a patent doesn’t mean that Apple will use the curved glass display in future iPhones or iPads, it is good to know that Apple has the option to use it in next generation iOS devices, Cinema Displays and potentially even televisions.

[USPTO via Patently Apple]

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  • Zayl

    I thought the world moved away from curved glass?

    • Tehe

      Seems to be curving back to it.

      • Steve Kennard

        So is the world Flat or Curved ?

  • Po Wah

    lol didn’t Samsung just announced this couple months ago? Apple’s out of ideas it seems

    • Andrew

      Yeah Samsung mentioned and apple came up with a way to make it work and had a good enough idea worth getting a patent for it. Maybe this is a hint at the eyePhone lol.

    • Kao

      It takes years for a patent to be awarded from the time it’s filed.

  • el

    damn ….. patent like this kind prevent other more capable people from making and selling it just because you got it patented first…… damn silly patent rules…..

    someone cannot produce it and want to stop others from producing it …… lousy loser

  • pakaku

    I think a better use for this would be for the Magic Mouse. The trackpads use glass, doesn’t the mouse still use plastic?